Tread fo



' Figure l is a plan view-of atread adapted for ing, or anyoth'er 'a surface which is non-slippable, so thata perandv fall.

cnARLss w. LOCKE, or LOWELL,

AnEnicANMAsoN sAFE'rv 'IREAD COMP Trea ures srA'ms,

MASSACHUSETTS, ASSIGNOR 'lO .Tlllu ANY, OF SACO, MAINE.-

' SPECIFICATION forming part of Letters Patent No. 605,732, dated June 14, 1898.

Amlication filed June 1,-1

To all whom, it may concern:

Be it known that 1, CHARLES W. Looks, of Lowelhin the county of ll i ddlesex and State of Massachusetts,have in vented certain new and usefullmprovements in Treads for Stairs, &c., of which the following is a specification.

My invention relates to the novel manufacture of treads for stairs, sidewalk-plates, walk-lights, coal-.hole covers, carriage-steps, stirrups, and other places where it is desirable to have a non-slippable surface.

The object of this invention is to produce grooves C deposited slippable The holes be straigh son stepping or walking thereon cannot slip In the accompanying drawings, which illustrate a construction embodying my invention, 1

said plate use with steps. Fig. 2 is a cross-sectional view-on the line X X, Fig. 1, looking in the direction indicated by the arrow. Fig. 3 is a detail reversed plan view of a portion of a plate. Fig. 4 is a detail sectional view hereina-fter described.

Like letters of reference refer to like parts holes.

throughout the several views. Instead The plate A is of hard metal and may be back to the plate A another plate G may be produced by rolling, punching, drawing, forg-- desirable method, and prefrably is made of mild steel, which forms thee wearing'surface, and is provided with a nose 15,. which llts over the edge of the step. This plate A is. provided longitudinally and transversely on its'upper surface with grooves and l), respectivelyyand each section of the plate between said grooves is provided with a hole E, which is iillcd with asoft nonslippahie mater'al E, as lead, which maybe placed in said. holes by pouring enrolling.- The under side of the plate A is providedat certain places with extensions F, which form a part, n'cierabl y, ofthe plate A, and these metal extensions bear upon the step or other place where the tread is being placed, and the hole l extends throngh'said metal extensions,'and by means of sore ws the plate is firmly secured to the step or other place. 'lhe holes h" where these extensions l are located are not ii lied with the non-slippable material, but are l 4, an d see screws G up all the Having invention left for the or arrangement desired: hen the plate above upon the step, the said step for saidplate, into the holes E spreads out under the plate A in the space of the step,

by the back of the step, formed under the plate the stepand said plate, filled up the lead fills all the holes E, and by this arrangement it is obvious that the lead E in' the holes E the plateA and is 897. Serial No- 638,887, at model.)

passage of the screws. In the and D the dirt from the shoes is away from the top of the plate.

It is obvious that the foot striking the soft non-slippable material E and falling, and thus there is produced a nonprevents slipping surface -adapted for various uses.

E, in which the lead is placed, may t or tapering or of any shape, size,

described is placed forms a backing and the lead poured or rolled between said plate and the top and said lead is confined under by the nose B and side lugs A and so that a reservoir is A between the top of and as said space is cannot be separated from held seeurelywithin said of using-the top of the step for a placed under said plate A, as shown in Fig.

ured to the plate'Aand the step by When into-the h'oles E, it spreads out in the space between the plate G and the plate A and formsa reservoir G, and O is filled the lead which is being poured in fills when said reservoir holes E.

If the .entire'bottom of the plate A is in close contact with the body of lead can be formed underneath, in a manner as above described, metal may be plate A and thus hold the soft material in top of the step, so that no then pieces of cast across the holes E of the lace. v

I'do not limit myself to the arrangement and construetionshown, varied without departing 1 my invention.

as the same may be from the spirit of thus ascertained the nature of my and set forth a construction enibodyin g the same, what I claim as new, and

the lead is poured or rolled desire to secure by Letters Patent of the soft material in place, and longitudinal and United States, is transverse grooves between said holes. l. A tread for stairs and other purposes con- 4. A tread forstairs and other purposes consisting of a plate of hard metal provided with sisting of a plate of hard metal provided wit 25 5 holes extendi each hole. soft material in place, longitudinal and trans-v 30 1o 2. A tread forstairs and other purposes,eonverse grooves between said holes, l -ild mpahs sisting, of a plate of hard metal provided with for holding a body of lead on the underside holes in combination with a soft material of said plate.

plaeedin said holes toproduceanon-slippable In testimony whereof I haves gnetl my surface, and means for holdinga body of lead name to this specification, in the presence of, 15 on the under side of said plate.

sisting of a plate of hard metal provided with holes extending through said metal and tapering upwardly in combination with a soft Witnesses: 2o material placed in said holes to produce a A. L. MESSER,

non-slippable surface, means for holdingsaid G. A. STEWART. 

